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问题 单项选择题

灯炮上标有220V，40W的字样，其意义是（）。

A.接在220V以下的电源上，其功率是40W

B.接在40V电源上，其功率是220W

C.接在220V以上的电源上，其功率是40W

D.接在220V电源上，其功率是40W

答案

参考答案：D

改错题

短文改错

Dear James,

     I'd like to tell you anything about our sports meet. It was holding on Oct. 10th, that was a fine day.

There were over 2,000 students and teachers attend it. Yu Le, a student from my class won the

100meter race. He finishes the race in 12.6 seconds and broke in the school record. The sports meet

was really success. That was because we were all trying to do my best. Although I was not one of the

winners, I was proud of that we had done.

     I am looking forward to receive your letter.

                                                                                                                                                             

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问答题 简答题

血液由哪几部分组成的？各部分都包括什么成分？
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